﻿using System.Threading;
using DM4;
using sscore;
using System;
using System.Collections.Generic;
using sscore.Utils;
using System.Text.RegularExpressions;
using System.IO;
using System.Net;
using sscore.Requests;

namespace KY
{
    public class KY : ModuleBase
    {
        private readonly string _searchUrl;
        private readonly string _offenderLink;
        private readonly string _imageLink;
        private const string StateName = "KY";
        private ResultFile _imagesResultFile;
        readonly string[] _searchParam = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" };

        public KY()
        {
            //initialize main system constants
            ModuleCode = "SO_KY";
            Description = "KY Sex Offenders";
            Version = "1.0";

            //for creating sessions
            StartParam = 0;
            StopParam = _searchParam.Length - 1;

            //initialize help 
            AddToHelp(DM4Consts.StartPosition, String.Format("{0}...{1}", StartParam, StopParam));
            AddToHelp(DM4Consts.EndPositon, String.Format("{0}...{1}", StartParam, StopParam));

            AddToHelp(DM4Consts.IsDownload, "true|false");
            AddToHelp(DM4Consts.IsDownloadImg, "true|false");
            AddToHelp(DM4Consts.InsertToDb, "false|true", "(Expected: servername, dbname)");
            AddToHelp(DM4Consts.ServerName, "");
            AddToHelp(DM4Consts.DbName, "");
            AddToHelp(DM4Consts.IsClearDb, "false|true");
            AddToHelp(DM4Consts.TestParam, "false|true");

            Rpm.Codepage = EncodingType.Iso88591;
            RootUrl = "http://kspsor.state.ky.us/";
            _searchUrl = RootUrl + "sor/servlet/SOR?form=1&lnm={0}&srt=1&page={1}";
            _offenderLink = RootUrl + "sor/servlet/SOR?id={0}";
            _imageLink = RootUrl + "sor/photos/{0}.jpg";
        }

        private void SetParametersDefaults()
        {
            Params.CreateBooleanParam(DM4Consts.IsDownload, true);
            Params.CreateBooleanParam(DM4Consts.IsDownloadImg, true);
            Params.CreateBooleanParam(DM4Consts.InsertToDb, false);
            Params.CreateBooleanParam(DM4Consts.IsClearDb, false);
            Params.CreateStringParam(DM4Consts.DbName, "");
            Params.CreateStringParam(DM4Consts.ServerName, "");
            Params.CreateIntegerParam(DM4Consts.StartPosition, StartParam);
            Params.CreateIntegerParam(DM4Consts.LastPosition, Params.GetIntegerParam(DmConsts.StartPosition));
            Params.CreateIntegerParam(DM4Consts.EndPositon, StopParam);
            Params.CreateIntegerParam(DM4Consts.LastRecord, 0);
            Params.CreateIntegerParam(DmConsts.LastPage, 1);
        }

        public override OperationResult Init(IDM4Core iCore, DmTaskParams param)
        {
            //use basic initialization sequence
            base.Init(iCore, param);

            SetParametersDefaults();
            return new OperationResult { Result = DM4Consts.Ok };
        }

        public override OperationResult Start()
        {
            DoWork();
            return new OperationResult { Result = DM4Consts.Ok };
        }

        public override OperationResult DoWork()
        {
            OperationResult or = new OperationResult { Result = DM4Consts.ErrorUnknown };

            if (!Ct.IsCancellationRequested)
            {
                WriteLog("Start parameters:", MessageType.Warning);
                foreach (KeyValuePair<string, string> kvp in Params.GetDictionary()) //get all existing parameters
                    WriteLog(String.Format("Key = {0}, Value = {1}", kvp.Key, kvp.Value), MessageType.Warning);

                if (Params.GetBooleanParam(DM4Consts.IsDownload))
                    Load();

                if (Params.GetBooleanParam(DM4Consts.InsertToDb))
                    if ((Params.GetStringParam(DM4Consts.DbName) == "") || (Params.GetStringParam(DM4Consts.ServerName) == ""))
                    {
                        or.Message = String.Format("{0} or {1} is empty", DM4Consts.DbName, DM4Consts.ServerName);
                        ResultCode = DM4Consts.SessionResultCodeError;
                        ResultMessage = or.Message;
                        UpdateStatus(DmConsts.Error);
                        WriteErrorLog(or.Message); //writting to error and session log   

                        return or;
                    }
                    else
                    {
                        //insert offenders to db 
                        UpdateStatus(DM4Consts.SessionInsertToDb);

                        Offenders.OffInsertToDatabase(StateName, Params.GetStringParam(DmConsts.DbName),
                             Params.GetStringParam(DmConsts.ServerName), ResultDir, Params.GetBooleanParam(DmConsts.IsClearDb),
                             WriteLog);

                    }

                //check if need abort task
                if (Ct.IsCancellationRequested)
                {
                    ResultCode = DM4Consts.SessionResultTerminateByUser;
                    ResultMessage = "Session terminated by user";
                    UpdateStatus(DM4Consts.SessionWait);
                    WriteLog("Session aborted by user", MessageType.Cool);
                }
                else
                {
                    UpdateProgress(1);
                    ResultCode = DM4Consts.SessionResultCodeOk;
                    ResultMessage = String.Format("Session complete, errors : {0}, records : {1}", TaskParams.ErrorCount, TaskParams.RecordCount);
                    UpdateStatus(DM4Consts.SessionComplete);
                    WriteLog("------------Finish----------------", MessageType.Cool);
                }
            }
            else
            {
                ResultCode = DM4Consts.SessionResultTerminateByUser;
                ResultMessage = "Session terminated by user";
                UpdateStatus(DM4Consts.SessionWait);
                WriteLog("Session aborted by user", MessageType.Cool);
            }


            return or;
        }

        private void Load()
        {
            string resultFileName = String.Format("{0}\\{1}.{2}", ResultDir, TaskParams.SessionId, DmConsts.ResultFilesExtension);
            bool workFlag = true;

            ResultFile = new ResultFile(resultFileName, OffendersResult.GetHeader());
            _imagesResultFile = new ResultFile(String.Format("{0}\\{1}_images.{2}", ResultDir, TaskParams.SessionId, DM4Consts.ResultFilesExtension), "FileName|FileUrl");
            try
            {
                while (workFlag)
                {
                    //рабочий цикл
                    string error;

                    try
                    {
                        error = "";  //Required!!  /*if (!String.IsNullOrEmpty(error)) --> restart thread; else --> download finished*/

                        WriteLog("Start download...");
                        Searching();
                    }
                    catch (Exception e)
                    {
                        error = e.Message;
                    }

                    if (!String.IsNullOrEmpty(error))
                    {
                        Thread.Sleep(30000);
                        WriteErrorLog(error);
                        WriteLog("Try continue work...", MessageType.Warning);
                    }
                    else
                    {
                        workFlag = false;  //все нормально откачало, заканчиваем работу
                    }
                }
            }
            finally
            {
                ResultFile.Close();
                _imagesResultFile.Close();
            }
        }

        private void Searching()
        {
            if (Test)
            {
                Params.SetIntegerParam(DmConsts.LastPosition, Params.GetIntegerParam(DmConsts.StartPosition));
                Params.SetIntegerParam(DmConsts.EndPositon, Params.GetIntegerParam(DmConsts.StartPosition));
            }

            if (Params.GetIntegerParam(DmConsts.EndPositon) > StopParam)
                Params.SetIntegerParam(DmConsts.EndPositon, StopParam);

            for (int indSearchParam = Params.GetIntegerParam(DmConsts.LastPosition); indSearchParam <= Params.GetIntegerParam(DmConsts.EndPositon); indSearchParam++)
            {
                //check if need abort task
                if (Ct.IsCancellationRequested)
                    break;

                Params.SetIntegerParam(DmConsts.LastPosition, indSearchParam);
                UpdateProgress();

                WriteLog(string.Format("Process search param [{0}][{1}].",
                    Params.GetIntegerParam(DmConsts.LastPosition),
                    _searchParam[Params.GetIntegerParam(DmConsts.LastPosition)]));

                NavigateByPage();
            }
        }

        private void NavigateByPage()
        {
            do
            {
                if (Ct.IsCancellationRequested)
                    break;

                WriteLog(string.Format("go to result page with search param. [{0}][{1}]; page [{2}]",
                   Params.GetIntegerParam(DmConsts.LastPosition),
                   _searchParam[Params.GetIntegerParam(DmConsts.LastPosition)],
                   Params.GetIntegerParam(DmConsts.LastPage)));

                string html = GetRedirectRequest.UrlOnly(string.Format(_searchUrl,
                            _searchParam[Params.GetIntegerParam(DmConsts.LastPosition)],
                            Params.GetIntegerParam(DmConsts.LastPage)),
                        Rpm);

                if (RegExpr.IsMatch(html, @"(?si: - 0 matches)"))
                    WriteLog("No matches were found");
                else
                {
                    string count = RegExpr.Parse(html, @"(?si:</b>\s*-\s*([\d]+)\s*matches)").Trim();
                    if (string.IsNullOrEmpty(count) || !RegExpr.IsMatch(html, @"(?si:SOR_HEADER.jpg)"))
                        throw new Exception("Result page: " + DmConsts.ExcNeedRestart);

                    WriteLog(String.Format("Search result: found [{0}] offenders", RegExpr.Parse(html, @"(?si:</b>\s*-\s*([\d]+)\s*matches)").Trim()));
                    ParseResultPage(html);
                }

                html = HtmlUtils.ReplaceSpecSymbols(html);
                if (!RegExpr.IsMatch(html, @"(?si:>\s*Next\s*>\s*>\s*</a>)"))
                    break;

                Params.SetIntegerParam(DmConsts.LastPage, Params.GetIntegerParam(DmConsts.LastPage) + 1);

            } while (true);

            Params.SetIntegerParam(DmConsts.LastPage, 1);
        }

        private void ParseResultPage(string html)
        {
            html = HtmlUtils.KillSpace(HtmlUtils.ReplaceSpecSymbols(html.Replace("\r\n", " ").Replace("\t", " ").Replace("\r", " ").Replace("\n", " ")));

            MatchCollection mc = RegExpr.ParseMatchCollection(html, @"(?si:<a href=""SOR\x3Fid=([\S]+)""><b>)");
            WriteLog(String.Format("found [{0}] matches", mc.Count));
            if (mc.Count == 0)
                throw new Exception(DmConsts.ExcNeedRestart + Environment.NewLine + html);

            List<string> list = new List<string>();

            foreach (Match matchLoc in mc)
                if (!list.Contains(matchLoc.Groups[1].Value))
                    list.Add(matchLoc.Groups[1].Value);

            WriteLog(String.Format("found [{0}] id[s]", list.Count));

            for (int i = Params.GetIntegerParam(DmConsts.LastRecord); i < list.Count; i++)
            {
                //check if need abort task
                if (Ct.IsCancellationRequested)
                    break;

                Params.SetIntegerParam(DmConsts.LastRecord, i);
                string lookupKey = list[i];
                string offenderHtml = GetRequest.WithCookies(string.Format(_offenderLink, lookupKey), Rpm);
                WriteLog(String.Format("ParseOffender [{0}][{1}]", Params.GetIntegerParam(DmConsts.LastRecord), lookupKey));

                if (!RegExpr.IsMatch(offenderHtml, @"(?si:SOR_HEADER.jpg)"))
                    throw new Exception("Offenders page:" + DmConsts.ExcNeedRestart);

                ParseOffender(offenderHtml, lookupKey);
                UpdateRecordCount(1);

            }
            Params.SetIntegerParam(DmConsts.LastRecord, 0);
        }

        private void ParseOffender(string offenderHtml, string lookupKey)
        {
            offenderHtml = HtmlUtils.KillSpace(HtmlUtils.ReplaceSpecSymbols(offenderHtml.Replace("\r\n", " ").Replace("\t", " ").Replace("\r", " ").Replace("\n", " ")));
            using (OffendersResult or = new OffendersResult())
            {
                or.Source_State = StateName;
                or.offenderLink = string.Format(_offenderLink, lookupKey);
                or.Source_id = lookupKey;

                string htmlImgUrl = RegExpr.Parse(offenderHtml, @"(?si:/photos/([\S]+).jpg"")");
                if (Params.GetBooleanParam(DmConsts.IsDownloadImg) && htmlImgUrl != "")
                {
                    or.Image_ID = Guid.NewGuid() + ".jpg";
                    or.ImageLink = string.Format(_imageLink, htmlImgUrl);
                    try
                    {
                        Offenders.DownloadImageWithExceptions(_imagesResultFile, String.Format("{0}\\{1}\\{2}", ResultDir, DmConsts.PhotosDir, or.Image_ID), 
                            or.ImageLink, TaskParams.SessionId);
                    }
                    catch (WebException webEx)
                    {
                        if (((HttpWebResponse)webEx.Response).StatusCode == HttpStatusCode.NotFound)
                        {
                            or.Image_ID = "";
                            or.ImageLink = "";
                        }
                        else throw new Exception("error in downloading offenders image", webEx);
                    }
                    catch (Exception ex)
                    {
                        //если произошла загрузка битой картинки
                        if (ex.Message == "Parameter is not valid." && ex.StackTrace.StartsWith("   at System.Drawing.Bitmap..ctor(String filename)"))
                        {
                            or.Image_ID = "";
                            or.ImageLink = "";
                        }
                        else
                            throw new Exception("Error occured while downloading image: " + or.ImageLink, ex);
                    }
                }

                if (or.Image_ID != "" && !File.Exists(String.Format("{0}\\{1}\\{2}", ResultDir, DmConsts.PhotosDir, or.Image_ID)))
                    throw new Exception(DmConsts.ExcImgNotFound);

                offenderHtml = HtmlUtils.KillSpace(RegExpUtils.DeleteTag(offenderHtml));

                or.fullname = RegExpr.Parse(offenderHtml, @"(?si:Name\s*:\s*</td>\s*<td>(.*?)</td>)").Trim();
                or.Birthdate = RegExpr.Parse(offenderHtml, @"(?si:Birth Date\s*:\s*</td>\s*<td>(.*?)</td>)").Trim();
                or.sex = RegExpr.Parse(offenderHtml, @"(?si:Sex\s*:\s*</td>\s*<td>(.*?)</td>)").Trim();
                or.Ethnicity = RegExpr.Parse(offenderHtml, @"(?si:Race\s*:\s*</td>\s*<td>(.*?)</td>)").Trim();
                or.eye_color = RegExpr.Parse(offenderHtml, @"(?si:Eye Color\s*:\s*</td>\s*<td>(.*?)</td>)").Trim();
                or.hair_color = RegExpr.Parse(offenderHtml, @"(?si:Hair Color\s*:\s*</td>\s*<td>(.*?)</td>)").Trim();
                or.height = RegExpr.Parse(offenderHtml, @"(?si:Height\s*:\s*</td>\s*<td>(.*?)</td>)").Trim();
                or.weight = RegExpr.Parse(offenderHtml, @"(?si:Weight\s*:\s*</td>\s*<td>(.*?)</td>)").Trim();
                or.registered = RegExpr.Parse(offenderHtml, @"(?si:Registered\s*:\s*<td>(.*?)</td>)").Trim();
                or.Status = RegExpr.Parse(offenderHtml, @"(?si:Reg Status\s*:\s*<td>(.*?)</td>)").Trim();
                or.Address = RegExpr.Parse(offenderHtml, @"(?si:Home\s*:\s*</td>\s*<td>(.*?)</td>)").Trim();

                foreach (Match matchLoc in RegExpr.ParseMatchCollection(
                    RegExpr.Parse(offenderHtml, @"(?si:Aliases\s*</tr>\s*<tr>\s*<td>\s*<table>(.*?)</table>)")
                    , "(?si:<td>(.*?)</td>)"))
                    if (matchLoc.Groups[1].Value.Trim() != "") or.AKA += matchLoc.Groups[1].Value.Trim() + ";";

                or.Crime = RegExpr.Parse(offenderHtml, @"(?si:Offense\s*:\s*</td>\s*<td>(.*?)</td>)").Trim();
                if (or.Crime == "")
                    foreach (Match matchLoc in RegExpr.ParseMatchCollection(RegExpr.Parse(offenderHtml, @"(?si:Offenses\s*:\s*</td>(.*?)</TABLE>)")
                   , "(?si:<td>(.*?)</td>)"))
                        if (matchLoc.Groups[1].Value.Trim() != "" && !matchLoc.Groups[1].Value.Trim().Contains("Age of Victim"))
                            or.Crime += matchLoc.Groups[1].Value.Trim() + "~";

                if (or.Crime != "")
                    or.Crime = "Offense~" + or.Crime;

                ResultFile.Write(or.GetValues());
            }
        }

        private void UpdateProgress()
        {
            if (Params.GetIntegerParam(DmConsts.StartPosition) > Params.GetIntegerParam(DmConsts.EndPositon))
                throw new Exception(String.Format("Invalid parameters {2}[{0}]; {3} [{1}]",
                    Params.GetIntegerParam(DmConsts.StartPosition), Params.GetIntegerParam(DmConsts.EndPositon),
                    DmConsts.StartPosition, DmConsts.EndPositon));
            if (Params.GetIntegerParam(DmConsts.LastPosition) > Params.GetIntegerParam(DmConsts.EndPositon))
                throw new Exception(String.Format("Invalid parameters {2}[{0}]; {3} [{1}]",
                    Params.GetIntegerParam(DmConsts.LastPosition), Params.GetIntegerParam(DmConsts.EndPositon),
                    DmConsts.StartPosition, DmConsts.EndPositon));
            if (Params.GetIntegerParam(DmConsts.StartPosition) > Params.GetIntegerParam(DmConsts.LastPosition))
                throw new Exception(String.Format("Invalid parameters {2}[{0}]; {3} [{1}]",
                    Params.GetIntegerParam(DmConsts.StartPosition), Params.GetIntegerParam(DmConsts.LastPosition),
                    DmConsts.StartPosition, DmConsts.LastPosition));
            UpdateProgress(((double)(Params.GetIntegerParam(DmConsts.LastPosition) - Params.GetIntegerParam(DmConsts.StartPosition))) / (Params.GetIntegerParam(DmConsts.EndPositon) - Params.GetIntegerParam(DmConsts.StartPosition) + 1));
        }
    }
}
